+module_param(xa_test, int, S_IRUGO | S_IWUSR);
+
+/* primitive to determine whether we need to have GFP_DMA set based on
+ * the status of the unchecked_isa_dma flag in the host structure */
+#define SR_GFP_DMA(cd) (((cd)->device->host->unchecked_isa_dma) ? GFP_DMA : 0)
+
+
+static int sr_read_tochdr(struct cdrom_device_info *cdi,
+ struct cdrom_tochdr *tochdr)
+{
+ struct scsi_cd *cd = cdi->handle;
+ struct packet_command cgc;
+ int result;
+ unsigned char *buffer;
+
+ buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
+ if (!buffer)
+ return -ENOMEM;
+
+ memset(&cgc, 0, sizeof(struct packet_command));
+ cgc.timeout = IOCTL_TIMEOUT;
+ cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
+ cgc.cmd[8] = 12; /* LSB of length */
+ cgc.buffer = buffer;
+ cgc.buflen = 12;
+ cgc.quiet = 1;
+ cgc.data_direction = DMA_FROM_DEVICE;
+
+ result = sr_do_ioctl(cd, &cgc);
+
+ tochdr->cdth_trk0 = buffer[2];
+ tochdr->cdth_trk1 = buffer[3];
+
+ kfree(buffer);
+ return result;
+}
+
+static int sr_read_tocentry(struct cdrom_device_info *cdi,
+ struct cdrom_tocentry *tocentry)
+{
+ struct scsi_cd *cd = cdi->handle;
+ struct packet_command cgc;
+ int result;
+ unsigned char *buffer;
+
+ buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
+ if (!buffer)
+ return -ENOMEM;
+
+ memset(&cgc, 0, sizeof(struct packet_command));
+ cgc.timeout = IOCTL_TIMEOUT;
+ cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
+ cgc.cmd[1] |= (tocentry->cdte_format == CDROM_MSF) ? 0x02 : 0;
+ cgc.cmd[6] = tocentry->cdte_track;
+ cgc.cmd[8] = 12; /* LSB of length */
+ cgc.buffer = buffer;
+ cgc.buflen = 12;
+ cgc.data_direction = DMA_FROM_DEVICE;
+
+ result = sr_do_ioctl(cd, &cgc);
+
+ tocentry->cdte_ctrl = buffer[5] & 0xf;
+ tocentry->cdte_adr = buffer[5] >> 4;
+ tocentry->cdte_datamode = (tocentry->cdte_ctrl & 0x04) ? 1 : 0;
+ if (tocentry->cdte_format == CDROM_MSF) {
+ tocentry->cdte_addr.msf.minute = buffer[9];
+ tocentry->cdte_addr.msf.second = buffer[10];
+ tocentry->cdte_addr.msf.frame = buffer[11];
+ } else
+ tocentry->cdte_addr.lba = (((((buffer[8] << 8) + buffer[9]) << 8)
+ + buffer[10]) << 8) + buffer[11];
+
+ kfree(buffer);
+ return result;
+}
+